package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> dishFlavorList = dishDTO.getFlavors();
        if(dishFlavorList != null && dishFlavorList.size() > 0) {
            dishFlavorList.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(dishFlavorList);
        }

    }

    @Override
    public PageResult pageSelect(DishPageQueryDTO queryDTO) {
        PageHelper.startPage(queryDTO.getPage(), queryDTO.getPageSize());

        Page<DishVO> dishVOS = dishMapper.pageSelect(queryDTO);
        return new PageResult(dishVOS.getTotal(), dishVOS);
    }

    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if(setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    @Override
    public DishDTO getById(Long id) {
        Dish dish = dishMapper.getById(id);
        DishDTO dishDTO = new DishDTO();
        BeanUtils.copyProperties(dish, dishDTO);
        dishDTO.setFlavors(dishFlavorMapper.getByDishId(id));
        return dishDTO;
    }

    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
            Dish dish = new Dish();
            BeanUtils.copyProperties(dishDTO, dish);

            dishMapper.update(dish);

            dishFlavorMapper.deleteByDishId(dishDTO.getId());

            List<DishFlavor> dishFlavorList = dishDTO.getFlavors();
            if(dishFlavorList != null && dishFlavorList.size() > 0) {
            dishFlavorList.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(dishFlavorList);
        }
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void setStatus(Integer status, Long id) {
        Dish dish = dishMapper.getById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }

}
